Defensive publication



7 20 DEFENSIVE PUBLICATION Q UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file 01! this application is available to the public for inspection reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED OCTOBER 28, 1969 811,195 PROCESS OF TREATING INDUSTRIAL ELASTOMERIC WASTE Joseph John Schmitt, Jr., Louisville, Ky., assignor to E. I.

du Pont de Nemours and Company, Wilmington, DeL.

a corporation of Delaware Filed Mar. 27, 1969. Published Oct. 28, 1969 Int. Cl. C02c 5/02; B01d 21/01 US. Cl. 210-49 No Drawing. 6 Pages Specification A process of treating industrial Waste water containing a dispersed elastomer such as neoprene in a concentration of 0.2 to 10.0 weight percent by (a) adding a coagulating agent such as calcium hydroxide or aluminum sulfate, (b) adding fly ash, preferably simultaneously, in the amount of at least one part fly ash to one part of elastomer and (c) agitating the mixture to form a water slurry of non-sticky coagulum. The fly ash renders the coagulum non-sticky allowing the slurry to be pumped and piped for further treatment without processing delays such a blockages and pump stops. 

